Thanks for these do-it-yourself tips, Tyll.
I wasn't aware of the 3m Dual Lock product but have used Radioshack "Superlock" strips for years. It is very similar to 3M's offering and may be easier for some folks to find. It is RS catalog #64-2360 and costs $3.99 for two 1" x 3" strips. You certainly don't need to use much due to its high tensile stength. Like with 3M it is also best to let the sticky-backed adhesive set for a couple of days before pulling the gear apart.